Backbone.js provides a framework for web applications by facilitating models that utilize key-value binding and custom event systems, collections that come equipped with a comprehensive API for enumerable functions, views that employ declarative event management, and seamlessly integrates with your existing API through a RESTful JSON interface. When developing a web application that heavily relies on JavaScript, a fundamental lesson is to avoid directly linking your data to the DOM. It can be all too common for JavaScript applications to devolve into a chaotic mix of jQuery selectors and callbacks, all struggling to maintain data synchronization between the HTML interface, your JavaScript code, and the server-side database. For creating dynamic client-side applications, adopting a more organized methodology is often beneficial. Backbone allows you to model your data as Models that can be created, validated, destroyed, and stored on the server, thereby streamlining the development process. This structured approach not only enhances maintainability but also improves the overall efficiency of your application.